Electronics Forum | Wed Sep 23 08:17:46 EDT 2009 | kpm135
I've run into mysterious light curtain errors before and what was happening was when the head moved across the top of the components one of the clear tape covers would flutter up and trigger the curtain then it would settle back down on top of the ta
Electronics Forum | Wed Sep 23 08:19:52 EDT 2009 | rgduval
Check to see if there's a loose cable, or something, that's randomly setting off the light curtain. We occasionally have that problem with some of our flex or 12/16 mags in our TP9, where the tape take up clip is loose (nothing in that feeder) and i
Electronics Forum | Thu Sep 24 17:00:03 EDT 2009 | dogsbody
would any body be able to supply me with infomation on how to adjust a quadalign unit,as a unit on my line will not pick up 0603 resistors,but will pick up thicker 0603 caps. My manuals offer no help.I have run the aligner calibration with the cone t
Electronics Forum | Fri Sep 25 16:47:57 EDT 2009 | esoderberg
0.5mm pitch QFP's are typically mixed with large components on all of my boards. I usually use a 6 mil stencil with a minimum aperture width of 10 mils. Normal aperture size is 10 x 50 which causes shorts about 20% of the time. A recent purchase of
Electronics Forum | Tue Sep 29 11:54:28 EDT 2009 | mikesewell
Here's a stab at it... Decide on how much overlap you need for your spray pattern and calculate your effective spray width. 4" spray with 25% overlap would be 3". Keep your units the same (unit lengths and unit length per unit time). Assumes your
Electronics Forum | Wed Sep 30 13:13:16 EDT 2009 | mikesewell
I never calculate it when I setup a profile...I have a feel for our fluxer setting and adjust based on belt speed and width. I also have different nozzles and a pressure setting to play with. Inspect the bottom of the board for good coverage. Runn
Electronics Forum | Mon Sep 28 16:15:57 EDT 2009 | davef
That your solder connections reflow properly when heated with a soldering iron, indicates that that your reflow recipe needs improvement. * Thermocouple the pads that require touch-up and adjust your oven recipe to assure that they reach liquidous+20
Electronics Forum | Thu Oct 01 08:34:50 EDT 2009 | davef
First, the reflow thermal recipe provided by your paste supplier is only a ball park guess. Beyond that, the temperature measured by thermocouples on your oven heaters are only loosely related the temperature of solder paste on your board. You need t
Electronics Forum | Mon Sep 28 10:51:02 EDT 2009 | shanenaturalpoint
My company recently purchased an MPM AP27 on the used market. I had the machine up and functional at one point, but now it is inoperable. I have correct power and air to the machine, but when I attempt to power it up, I get nothing. Red light on t
Electronics Forum | Mon Sep 28 14:02:15 EDT 2009 | swag
As mentioned previous, check all fuses & breakers. In the AC chassis (should be under black cover beind front, right door), remove cover and check main circuit breaker. Also should be two fuse housings next to breaker - if they are lit up amber, th